1WAA (Warm)
• ASCENDING motion
• CLOCKwise turning
• VEERING
2CAA (Cold)
• DESCENDING moti
• COUNTERclockwise turning
• BACKING
3Heat Wave
High-pressure systems force air downward; This force prevents air near the ground from rising; The sinking air acts like a cap; It traps warm ground air in place; Without rising air, there was no rain, and nothing to prevent the hot air
from getting hotter
4Precipitation produced by:
1. Bergeron (ice-crystal) process
2. Collision-and-coalescence
5Drops of water that fall from a cloud and have a diameter of at least ____ is considered RAIN
0.5 mm
6RAIN goes from ______ freezing to _____ freezing
ABOVE; BELOW
7SNOW temperature STAYS BELOW __ F
32 F
8Sleet
Ice particles form when raindrops FREEZE while falling through a COLD air layer & Above freezing air layer must overlie a subfreezing layer near the ground
9Freezing Rain
Supercooled raindrops freeze on CONTACT with solid objects (Subfreezing lower
air layer is NOT thick enough for raindrops to freeze)
10Ingredients for SUPERCELL:
1. Buoyancy
2. Moderate to strong speed and directical wind shear (surface to 20,000 ft is CRITICAL)
3. Mesoscyclone (storm tilted to seperate up/down draft region)
4. Seperate updraft and downdraft (long-lived; reduces too much rain-cooled, stable air from downdraft region to be ingestes into updraft)